As part of our transition to wireless navigation, we replaced our 31-year old radar with the Furuno 1st Watch Wireless Radar. The DSR4W only requires 12-volt power and will wirelessly transmit to two iOS devices simultaneously. Intuitive and easy to use, great features include a Guard Zone with alarm, night mode, and Off Center for looking further ahead. Plus, it will seamlessly overlay on the TZ iBoat navigation/chart app in realtime in 3D - with satellite image!